Wow! Impressive hp numbers for just a pulley change, 35 hp ain't too shabby!
Might have to consider this, option...

What else can you guys do with the Bosch ECM? I think we XF guys would like to raise our redline limits, due to the very annoying 6,000 limit.

As for the SRT6 brake conversion, I haven't done enough research on it. But it's on the list.

Personally the N/A crossfire would be perfect if it had another 100 hp. Which I'm almost sure is obtainable thru reworking the 3.2 heads with cnc and valves. And some ECU tuning. Oh yeah and don't forget cams either.

Otherwise go turbo or S/C to around 7 psi should get close to another 60 hp I would guess. I know Paxton is getting into the Chrysler vehicles now so we'll just have to see what comes our way...

If you built it, we will come.
Realistically this is where I would spend my money.